use SkShaper instead of SkTextBox

Change-Id: I63fae79007938cb89c122799b8984a88e91ac1e7
Reviewed-on: https://skia-review.googlesource.com/102863
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
2 files changed